JP2018076273A - 液体口腔用組成物 - Google Patents
液体口腔用組成物 Download PDFInfo
- Publication number
- JP2018076273A JP2018076273A JP2016220991A JP2016220991A JP2018076273A JP 2018076273 A JP2018076273 A JP 2018076273A JP 2016220991 A JP2016220991 A JP 2016220991A JP 2016220991 A JP2016220991 A JP 2016220991A JP 2018076273 A JP2018076273 A JP 2018076273A
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- JP
- Japan
- Prior art keywords
- shellac
- liquid oral
- oral composition
- solution
- ethanol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000000203 mixture Substances 0.000 title claims abstract description 45
- 239000007788 liquid Substances 0.000 title claims abstract description 41
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- 239000004208 shellac Substances 0.000 claims abstract description 63
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- 229940113147 shellac Drugs 0.000 claims abstract description 63
- 235000013874 shellac Nutrition 0.000 claims abstract description 63
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 29
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- 238000010438 heat treatment Methods 0.000 claims abstract description 10
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Abstract
Description
すなわち、本発明は下記<1>に関するものである。
<1>セラック:アルカリ化剤(質量比)が1:0.05〜1:0.14で、50〜90℃に加熱して調製されたセラック溶解液を含有し、実質的にエタノールを含まず、pH5〜9としたことを特徴とする液体口腔用組成物。
セラック溶解液は、常温にて溶媒にアルカリ化剤を添加し、セラックを添加して加熱し、5〜30分間撹拌することによって調製できる。
本発明で使用する溶媒は、口腔内に適用するという観点から、水性溶媒が好ましく、水性溶媒としては、例えば、水、ポリエチレングリコール、グリセリン及びこれらの混合液等が挙げられる。
これらのなかでも、水又は水混合液が好ましい。上記水としては、精製水、イオン水、蒸留水等の水を用いることができる。
本発明で使用するセラックは、日本薬局方等に記載されているラックカイガラムシの体を覆っている分泌物を精製して得られる樹脂状の物質であって、精製セラックや漂白をおこなった白セラックを用いることができる。セラックは、歯に光沢を与えることが可能である。
また、セラック溶解液を調製する際に、特定比率のアルカリ化剤を用いることにより、セラックを短時間で安定的に溶媒中に溶解させることができる。
セラック溶解液の調製においては、50〜90℃、好ましくは60〜80℃で、30〜120分間、好ましくは60〜120分間加熱することによって、セラックの溶媒に対する溶解性を向上させることができる。上記温度が低すぎると、液体口腔用組成物中に濁りが見られ、上記温度が高すぎると、溶媒が沸騰するおそれがある。
本発明の液体口腔用組成物は、上記調製したセラック溶解液を含有する。
液体口腔用組成物中にセラック溶解液を含有させる際のセラック溶解液の含有量は、液体口腔用組成物中にセラックが0.01〜2質量%、好ましくは0.1〜1質量%含有されるようにすればよい。
例えば、液体口腔用組成物中にセラック溶解液を0.02〜25質量%、好ましくは0.1〜10質量%含有させることができる。
ここで「実質的にエタノールを含まない」とは、エタノールの含有量が、液体口腔用組成物全体に対して、1質量%以下であることを意味し、好ましくは0.5質量%以下、より好ましくは0.1質量%以下である。
液体口腔用組成物中のエタノールの含有量が上記範囲であることにより、口腔内への刺激が低くなり、女性や子供等にも使用しやすい液体口腔用組成物中を調製することができる。
表1の配合処方に従い、精製水にアルカリ化剤として水酸化ナトリウムを溶解させ70℃に加熱し、セラックを添加してセラック溶解液を調製した。セラック溶解液に、その他の口腔用組成物原料を添加して混合した後、pH調整剤を用いてpHを表1の通りとして各液体口腔用組成物を調製した。
一方、セラックに対するアルカリ化剤の比率(質量比)が上記範囲外である比較例1及び2、pHが上記範囲外である比較例3の液体口腔用組成物においては、濁りが発生した。
表2の配合処方に従い、精製水にアルカリ化剤として水酸化ナトリウムを溶解させ、表2に記載の20℃〜100℃の間の各温度に液温を調節した。その後、セラックを添加してセラック溶解液を調製した。セラック溶解液に、その他の口腔用組成物原料を添加して混合した後、pH調整剤を用いてpH8.5として各液体口腔用組成物を調製した。
一方、20℃で加熱したセラック溶解液を含有する比較例4の液体口腔用組成物においては、濁りが発生した。また、該セラック溶解液を調製するのに半日以上を要した。さらに、100℃で加熱したセラック溶解液を含有する比較例5の液体口腔用組成物においては、精製水が沸騰したためセラック溶解液を調製することができなかった。
Claims (1)
- セラック:アルカリ化剤(質量比)が1:0.05〜1:0.14で、50〜90℃に加熱して調製されたセラック溶解液を含有し、実質的にエタノールを含まず、pH5〜9としたことを特徴とする液体口腔用組成物。
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JP2015003880A (ja) * | 2013-06-20 | 2015-01-08 | 章 金田 | 毛髪成形剤及び毛髪成形剤を使用した毛髪のスタイリングの施術方法 |
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JP2000154128A (ja) * | 1995-03-10 | 2000-06-06 | Eisai Co Ltd | 歯磨き組成物 |
JPH11147814A (ja) * | 1997-09-11 | 1999-06-02 | Earth Chem Corp Ltd | 液体口腔用組成物 |
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